I’ve got both and their have the pros and cons, here are my thoughts.
Tikka action is smoother operate and should be more ridged due to the fully enclosed top, but this makes it a little tighter if you want to single load a round into the chamber, the open top of the xbolt.
I find the bolt handle on the tikka to be more comfortable to use vs the skinny one on the xbolt.
Trigger on the tikka is better out of the box but the browning can easily be improved with a Yo Dave spring
Browning has a better stock with in the synthetic and wood versions, browning are bedded from the factory and the wood stock has nice sharp cut checkering
Accuracy from both is very good, tikka barrels are CHF while x-bolt are cut. But both should be capable of sub moa accuracy.
The xbolt is more compact overall since they use different length actions depending on the cartridge length and also shorter barrels for each cartridge vs the tikka.
Scope mounting is easy for each and I would recommend Talley light weight one piece rings.
Magazines are both good for each, with tikka having higher capacity ones available from the factory and single stack while the xbolt uses a rotary design
Tikka is far far more customizable with a large aftermarket supply of parts, if you want to change something such as a larger bolt handle it can be done easily and cheaply just changing the part.